#include <mystdio.h>
#include<mystring.h>
#include<stdio.h>

int main()
{
    myFILE* fp =mfopen("log.txt","a");
    char s[]="sssssssssssssss\n";
    mfwrite(s,1,strlen(s),fp);
    mfflush(fp);

    printf("s长度为：%d\n",mystrlen(s));

    return 0;
}